This paper describes the methods used to develop the Cariaco Basin PL07-58PC marine radiocarbon calibration
data set. Background measurements are provided for the period when Cariaco samples were run, as well as revisions leading
to the most recent version of the floating varve chronology. The floating Cariaco chronology has been anchored to an
updated and expanded Preboreal pine tree-ring data set, with better estimates of uncertainty in the wiggle-match. Pending any
further changes to the dendrochronology, these results represent the final Cariaco 58PC calibration data set.

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This work was supported by LLNL (97-ERI-009), DOE (W-7405-Eng-48), and NSF (ATM-
9709563).